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Discussion Starter · #21 ·
At the risk of resurrecting an old thread - any opinions on this?

I'd like to go with upgraded rear shocks. I'm a huge fan of Bilstein and I know that One1Wahoo. has gone with the Bilstein B6 24-171687 (Cruze fitment). However others (including EV-MODS) offer a Koni equivalent. While I would love to have Bilsteins in there, I wonder if a shock intended for the much-lighter Cruze might be under-damped; hence would an adjustable Koni be a better choice for retrofitting into a Bolt, than a non-adjustable Bilstein, since it can be dialed up a bit?

Thanks for your advice..
Take a look at the rear shocks, and try to imagine how you would get the Koni adjustment knob in place and turn it.
 

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Take a look at the rear shocks, and try to imagine how you would get the Koni adjustment knob in place and turn it.
Agreed, I was just looking at the Koni documentation - the rears apparently don't have a knob. You have to remove the shock, fully compress it to engage the valve adjuster, and twist shock body relative to the shock rod to adjust it. I suppose you could just unbolt the bottom and do the adjustment, but it still sounds like a total PITA. I don't even know how you could expect to compress it by hand.

The BC coilover rear shocks had a better adjustment system - there actually is a knob at the top that is easily accessible inside the wheel well. I played with it a bit while I had the BCs installed. The downside to that method that is that you can't keep the debris boot, which would prevent access to the knob. That might not be a great idea here in the snow belt (with road salt/sand/etc) for a winter daily-driver.
 

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Discussion Starter · #24 ·
I just drove home my 2020 bolt tonight. good priced lease in san diego. I immediately noticed something that my wife will be sure to complain about enough to not ride in the bolt. if you put your head back in the headrest there is considerably sway movement to your head. will this sway bar lessen that effect?
thanks
woody
No, you need to bend the headrest supports backward, as you will find documented here somewhere.
 

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Agreed, I was just looking at the Koni documentation - the rears apparently don't have a knob. You have to remove the shock, fully compress it to engage the valve adjuster, and twist shock body relative to the shock rod to adjust it. I suppose you could just unbolt the bottom and do the adjustment, but it still sounds like a total PITA. I don't even know how you could expect to compress it by hand.

The BC coilover rear shocks had a better adjustment system - there actually is a knob at the top that is easily accessible inside the wheel well. I played with it a bit while I had the BCs installed. The downside to that method that is that you can't keep the debris boot, which would prevent access to the knob. That might not be a great idea here in the snow belt (with road salt/sand/etc) for a winter daily-driver.
I got Konis for the rear of my 2020. It was pretty easy to adjust them before installation. I set them full soft, and I found that was a very comfortable setting. With the rear sway bar added, the handling is quite acceptable with improved ride comfort overall.
 

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No, you need to bend the headrest supports backward, as you will find documented here somewhere.
I've seen several complaints about this on the forum over the years, and they always puzzle me a bit. When I have my seat set nice and comfortably there's a good inch or more between my head and the headrest. Other people must adjust the seat a lot more upright than I do. Perhaps it's because I have relatively short limbs - my seat is probably further forward than a lot of folks and I have the steering wheel fully extended toward me.
 

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Did it! Put the Cruze Bilsteins on my 2019 yesterday. Only about 70 miles on them so far, but so far I‘m very pleased. I got them through Tire Rack, $111 each, $222+tax total, free shipping.
32890
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{"Ride Quality"}
Didn't change it appreciably. Better-controlled body roll is the main change, for more control over cornering.
What is 'ride quality? Some like it stiff, some like it soft.
A shock can't control body roll. It can control the rate the body rolls, but in a clover leaf the roll will be exactly the same.
If it is stiff to slow the roll rate, it will be stiff for normal driving over bumps.
Anti-sway bars control the amount of roll.
... I immediately noticed something that my wife will be sure to complain about enough to not ride in the bolt. ... will this sway bar lessen that effect?...
Well, less 'complaining in the car' sounds nice to me! ;)
"Let's meet at the restaurant, sweetie!" :cool:
A sway bar will only cause more 'bounce sway' when one side hits a dip that the other side doesn't.
Stiffer shocks will make for more bounce to the passengers. Softer, less.
To me, the stock shocks feel on the stiffly controlled side.

You know all these claims can be blind tested.
You know all these claims can be placebo.
 

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I had these rear shocks installed today: Bilstein B6 Performance Series 24-171687. $131 each shipped from Summit Racing, arrived the next day: Bilstein B6 Performance Series Shocks and Struts 24-171687

A local shop installed them for me for 1.5 hours labor - very reasonable. They do require several washers to fit the Bolt, as the bracket on the swing-arm of the Cruze was apparently considerably narrower than that on the Bolt. It took eight 9/16" stainless washers at the bottom of each shock to fit properly on the Bolt - see the image.
http://oi65.tinypic.com/3343v2q.jpg

The resulting change in handling of the Bolt is very gratifying. Where my unmodified 2019 always felt reluctant to turn into a corner during enthusiastic driving, the car now feels much more willing to take a corner, there is no longer a need to adjust the line in mid-corner while the car rolls back upright, and on corner exit you just straighten out smoothly.

There is very little difference in ride - bumps are really no more noticeable. I credit Bilstein for this, as their gas-pressurized shocks are known for taking small pavement irregularities in stride, and the result is generally a better ride than Koni Yellows I've installed over the years.

Because these shocks are gas-pressurized, they do increase ride height slightly. I measured the rear wheel arch height before and after, and found a negligible 4mm increase, as I expected.

It's a great mod - makes the car feel almost BMW-like - highly recommended.
A very late reply, but a note about the Koni yellow adjustable substitute (looking for a softer ride) that also requires washers on the sides. The Koni and maybe the Bilstein has a larger hole than the OEMs. Is this not considered a problem or will good bolt torque keep the shock from jerking up and down in the, now oversize, shock hole?
 

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A very late reply, but a note about the Koni yellow adjustable substitute (looking for a softer ride) that also requires washers on the sides. The Koni and maybe the Bilstein has a larger hole than the OEMs. Is this not considered a problem or will good bolt torque keep the shock from jerking up and down in the, now oversize, shock hole?
 

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I love McMaster. I would call their big yellow catalog my MFE Bible. They are technically business-to-business sales only though. But it's not hard to fill out their application form using a made-up business name and buy stuff. You can use your S.S. number for the Employer Identification Number (EIN). Well... you could do this years ago. I don't know if they will still allow it.
One drawback: Shipping costs can be high.
 

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I love McMaster. I would call their big yellow catalog my MFE Bible. They are technically business-to-business sales only though. But it's not hard to fill out their application form using a made-up business name and buy stuff. You can use your S.S. number for the Employer Identification Number (EIN). Well... you could do this years ago. I don't know if they will still allow it.
One drawback: Shipping costs can be high.
I have been buying from them for years, including just last week, and never claimed to be anything but me. Yes, they are the absolute best.
 

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the car now feels much more willing to take a corner, there is no longer a need to adjust the line in mid-corner while the car rolls back upright, and on corner exit you just straighten out smoothly.
So you wanted the Bolt to ride even firmer? I am hoping for a much softer ride over square edged bumps. By the way. A twist beam rear suspension already is a giant anti-roll bar. Which adds to the stiff ride over uneven, one wheel bumps. Which is probably the biggest contributor to the harsh ride in the rear that we are feeling. This is the cheapest and most basic rear suspension design that is available. And then the engineers tuned the front to match.
 

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I got Konis for the rear of my 2020. It was pretty easy to adjust them before installation. I set them full soft, and I found that was a very comfortable setting. With the rear sway bar added, the handling is quite acceptable with improved ride comfort overall.
Which model Koni shock did you get? If you have a link, that is even better - thanks!

Edit: EV-Mods has the Bilstein shocks on sale for $220 / pair - so I have ordered them.

Bilstein B6 Rear Shocks Chevy Bolt, Chevy Cruze (Rear Pair)
 

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I had a test street. At legal speed with perfectly good original rear shocks the milk crates in the back would bounce off the floor. With the Koni's set on max soft rebound they would not. And my 83 year old neck joints felt better with the Koni's. That's my version of the scientific method. The milk crate bounce test.
 

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Right - for rear seat passengers, going over some dips / bumps in the road would cause their necks to be jarred way too often; and has done ever since we bought it new. And our 2017 Bolt has about 65k miles on it - shocks wear out. I will probably order the Koni shocks, and then consider the rear sway bar.

How many settings are there on the Koni shocks for damping adjustment?

Edit: I just ordered the Koni shocks from Shock Warehouse:

KONI 8240 1293SPORT Rear Sport (Yellow) - Shockwarehouse.com

The price was $113.21 each, so under $227 shipped.
 
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